update changelog with previous commits
UsersBase: fix checking for set password (can be NULL)
add AuthenticatedPresenter trait & refactor BaseLoggedPresenter
fix jGrowl error list selector
Utils\Validators: update extension validation for multiple files, refactoring
update sandbox-sync.txt & changelog
clean up Users:Front:Default:edit template
Acl: sync code constants with database
remove .htaccess.server
cleanup Error module layout
refactoring of ACL module